DC Motors & AC with VFD

[koay9f]

From Ron Wroblewski 10/10/2024

Also, something to think about for future releases possibly?... The way Don designed PSAT and FSAT was solely focussed on AC induction motors. At this facility, of their three big fans, they have one fan on VFD, one fan is a constant speed AC induction motor, and one fan is a DC motor.
For the VFD and the DC drive, I spent a lot of time explaining that don't worry, ignore the amps and the power factor in the results as they are not applicable, but don't worry, the rest of the model is still valid. On the VFD case, on the output side of the VFD the voltage is reduced, and the amps are correlated with the new lower voltage, and the PF is not valid, while on the DC motor, the power factor is not valid, and again the amps and volts do not correspond as they would on an AC induction motor.